Self-threading shuttle.



G. M. CHENEY.

SELF THBEADING SHUTTLE. APPLICATION nun 00-1225, 1907.

Patented July 22, 1913.

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Us! a GEORGE 1VJI. flHENE'l', O15 SOUTHBRIDGE, MTASEEAOHUSETTS.

SELF-THREAIDING SHUTTLE.

To all whom it may concern:

Be itknown that l, Gnonon M. Gunter, a citizen of the United States, residing at Southbridgc, in the county of l i orcest-er and State of h lassachusetts, have invented an Improvement in Self-Threading @hutties, of which the following description, in connection with the accompanying drawing, is a specification, like letters on the drawing representing like parts.

This invention relates to what are known as self-threading shuttles, and the object of the invention is to provide a cmistruction of sclfthreading shuttle which. shall be simple and accurate in its operation, and at the same time readily and economically manufactored.

Self-threading shuttles which have hereto fore been devised and manufactured are, so far as l am aware, open to various objections. Either they are so complicated in construction as to add so materially to the cost of manufacture as practically to prohibit their use, or the operation of threading re quires so much time and manipulation as to overbalance the advantage of self-threading, or in the operation of thriading the shuttle other courses than directly into the delivery-eye are open to tie thread, and consequently the thread is not always placed in the delivery-eye, or escapes therefrom into improper position.

The present invention presents a shuttle of the simplest possible construction, one that can be manufactured by a very tew mechanical operations, one that has practically but one additional part, and that is readily and cheaply manufactured, and consequently one which can be put into practical use at a very slight addition to the cost of manufacture of the entire shuttle.

The invention furthermore presents a construction which is accurate and. sure in the threading operation. The construction is such that the thread must pass directly into the delivery-eye and cannot be directed by the operator into any other position, and when once in the delivery-eye cannot become unthreaded therefrom.

The invention also provides an adjustable tension device for varying the drag or tension on the thread.

The drawings illustrate a shuttle constructed in accordance with the invention, in its preferred form.

In the drawings, Figure l is a top view Specification of Letters Patent.

Application filed tlctober 25, 190?.

Patented July 227, 1913. Serial No. 398,168.

l of a shuttle embodying the invention with a bobbin therein; Fig. 2 is a side elevation thereof showing the delivery-eye; Fig. 3 is a cross-section of the shuttle through the thread. delivery passage looking toward the smaller end of the shuttle taken on the line mo::, Fig. 1; Fig. t is an enlarged side elevation of the shuttle shown in Fig. 2; Fig. F is a view similar to Fig. 41 but showings slightly difterei'it construction; Fig. 6 is aview of the delivery-eye detached.

The general construction of the shuttle need not be described since it is but for the self-threading feature of old and common form.

it indicates the body of the shuttle, ll the recess formed therein for the reception of the bobbin, U the bobbin itself, and D the usual longitudinal groove in the side wall of the shuttle.

There is formed in the forward end. of the shuttle a thread delivery passage E, extending through the side wall of the shuttle, and a threading slit F, connecting the bobbin containing recess with the thread delivery passage. In general these features are wellhnown, and in the preferred form of the invention the threading slit is formed of two passages or slots, one f extending horizontally into the wall of the shuttle and communicating with the thread. delivery passage lit at one side thereof, and the other f extending diagonally downward into the body of the shuttle and running in a diagonal direction from the center of the forward end of the bobbin containing recess.

An enlarged recess G is formed in the shuttle in line with the thread delivery passage E and the center of the bobbin containing recess. In this recess G is mounted the tension device which comprises a post- Gr arranged transversely of the thread delivery eye so that the thread in passing from the bobbin containing recess to the thread delivery eye will pass around the post G. One side of the post G- is slabbed oil" at so that the post presents a segmental crosssection, and .the post is screw-threaded and provided at g with a slot whereby it can be rotarily adjusted. It will. thus be seen that with the thread passing as indicated in 1 there will be a comparatively slight amount of drag or tension on the thread, while if the post he turned the thread will drag around a greater length of the periplr cry of the post and thus increase the tension or drag on the thread. Thus is provided a very accurate means of adjusting the tension on the thread.

The delivery-eye illustrated in detail in Fig. 6 and which is placed at the mouth of the thread delivery passage, is an open delivery-eye; that is, one into which the thread can be passed through an opening in the walls thereof. In its preferred form it is constructed of wire, bent to form a coil 0, the ends overlapping to form the opening into the delivery-eye. One end is bent directly down to present a leg 0 and the other end is bent back on itself as at 0 and then down to present a leg 0 The delivery-eye is held in place by driving the legs 0, 0 directly into the body of the shuttle one on each side of the threading slit where it communicates with the thread delivery passage E. This may be accomplished in various ways, but preferably a recess is formed in the side wall of the shuttle slightly larger in diameter than the mouth of the thread delivery passage, and thus presents a flat wall 2 into which the legs of the delivery-eye may be driven. The important feature is that the thread delivery-eye thus presents projecting from itself to each side of the threading slit guards or projections which prevent the thread as it comes through the threading slit along the part of the slit f from passing anywhere but directly into the opening of the delivery-eye. It is impossible for the thread to pass around the out-side of the delivery-eye and become tangled or be delivered in an improper or undesirable position. The legs 0, 0 insure the direction of the thread into the opening of the delivery-eye. It is also necessary to prevent the thread after it is in the delivery-eye from passing out through the opening thereof, and becoming unthreaded. This is not so objectionable in the present invention as in other forms of self-threading shuttle, because even if the thread becomes unthreaded it cannot pass around the delivery-eye and become seriously tangled, but the present device is so constructed as to prevent the unthreading of the shuttle This may be accomplished in several ways.

In Fig. 4 the coil 0 is placed substantially concentric with the thread delivery passage E, and is slightly larger in diameter than the mouth of said thread passage, so thatthe inner edge of the thread passage presents a shoulder which prevents the thread from catching beneath the point 0 of the coil and passing out through the opening.

In Fig. 5 the thread delivery passage E is eccentric of the coil and of such diameter that no shoulder is presented to guide the thread away from the point 0 but the point 0* in this case is extended sufiiciently far behind the coil that the thread runningaround the inner side of the coil is prevented by the coil itself from catching under the point 0" and becoming unthreaded. Either means of preventing the thread from catching on the end or point of the opening in the delivery-eye is common, and the present invention is not concerned with this feature of the construction.

It will thus be seen that the construction described is extremely simple in its construction, and yet affords an accurate and eflicient self-threading shuttle. The thread delivery-eye has been shown as made of wire in one piece, and this is the simplest and most satisfactory form, but it is obvious that it might be constructed in other ways and of other material, the essential feature being that it must present a guard or projection on each side of its opening extending to each side of tl e threading slit, so as to insure the passage of the thread from the slit directly into the eye, and prevent its passage into any other position.

Having described my invention, what I claim as new and desire to secure by Letters Patent, is

1. In a self-threading shuttle, a bobbin containing recess, a thread delivery passage, a threading slit connecting said recess and thread delivery passage, an open deliveryeye at the mouth of said passage, the opening of said eye being located to one side of the juncture of the said slit and passage, projections from opposite sides of said opening embracing said threading slit, whereby the thread is directed into said eye and prevented from passing elsewhere.

2. In a self-threading shuttle, a bobbin containing recess, a thread delivery passage, a threading slit connecting said recess and thread delivery passage, an open wire coil constituting a delivery-eye and present-ing legs on opposite sides of the opening driven into the shuttle on opposite sides of the threading slit.

3. In a self-threading shuttle, a bobbin containing recess, a thread delivery passage, athreading slit connecting said recess and thread delivery passage, a recess in the side wall of the shuttle larger than the mouth of said thread delivery passage, an open delivery-eye in said recess, projections from opposite sides of the opening of the delivery eye extending into the rear wall of said recess and embracing said threading slit.

4t. In a self-threading shuttle, a bobbin containing recess, a thread delivery passage, a threading slit connecting said recess and thread delivery passage, a recess in the side wall of the shuttle larger than the mouth of said thread delivery passage, an open wire coil constituting a delivery-eye and presenting legs on opposite sides of its opening driven into the rear wall of said recess on opposite sides of the threading slit.

5. In a self-threading shuttle, a bobbin containing recess, a thread delivery passage, a threading slit connecting said bobbin containing recess and thread delivery passage, an enlarged recess in the threading slit in line with the thread delivery passage, a tension post of segmental cross section mounted in said recess and of less diameter than said recess, and means whereby said tension post may be rotarily adjusted to bring more or less of its periphery into frictional contact with the thread.

6. In a self-threading shuttle, a bobbin containing recess, a thread delivery passage, a threading slit connecting said bobbin containing recess and thread delivery passage, an enlarged recess in the threading slit in line with the thread delivery passage, a tension post of segmental cross section mounted in said recess and of less diameter than said recess, means whereby said tension post may be rotarily adjusted to bring more or less of its periphery into frictional contact With the thread, an open delivery eye at the month of said thread delivery passage, and projections from the opposite sides of said opening embracing said threading slit whereby the thread is directed into said eye and prevented from failing to enter said eye.

7 A shuttle comprising a bobbin containing recess and a thread delivery passage connected with the bobbin containing recess and the exterior of the shuttle, an enlarged recess in line with said thread delivery passage, a tension post of segmental cross section mounted in said recess and of less diameter than said recess, and means whereby said tension post may be rotarily adjusted to bring more or less oi its periphery into frictional contact with the thread.

In testimony whereof, I have signed my name to this specification, in the presence of two subscribing Witnesses.

GEORGE M. CHENEY.

WVitnesses:

MARGARET A. DUNN, NATHAN HEARD.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

